• Title, Summary, Keyword: Pantograph

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development of kinematic analysis technique for pantograph structure design (판토그라프 구조설계를 위한 기구해석 기법 개발)

  • 박수홍;김휘준;정경렬;배정찬
    • Proceedings of the KSR Conference
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    • pp.107-114
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    • 1999
  • Pantograph, which collects current from cartenary system, is one of important parts of high-speed train. Kinematic analysis is basic component of pantograph design. But kinematic analysis is very complex and time-consuming. Therefore numerical calculation of pantograph kinematics is necessary. In this study, pantograph kinematic analysis software was developed and relationship between kinematic parameters and pantograph performance was investigated. The software and relationship between kinematic parameters and pantograph performance are helpful to pantograph designers

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The Study On The Dynamic Characteristics For The Pantograph Of A High-speed Rail Vehicle (고속전철용 판토그래프의 동적 특성 연구)

  • Kim, Jin-Woo;Park, Tong-Jin;Han, Chang-Soo;Chung, Kyul-Ryul
    • Proceedings of the KSME Conference
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    • pp.571-577
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    • 2001
  • In this paper, the dynamic response of the pantograph system that supplies electrical power to a high-speed rail vehicle were investigated. The analyses of the catenary based on the Finite Element Method (FEM) is executed to develop a pantograph fits well in high-speed focused on the dynamic characteristic analysis of the pantograph system. By simulation of the pantograph-catenary system, the static deflection of the catenary, the stiffness variation in contact lines, the dynamic response of the catenary undergoing constant moving load and the contact force analysis were executed. By the pantograph-catenary analysis, the design parameters of a pantograph could be optimized. For more improving the dynamic characteristics of the pantograph, the active-pantograph was investigated by controlling a contact force. The active pantograph showed the better performance compared to the parameter-optimized. However, the parameter-optimized pantograph would be acceptable for a high-speed rail vehicle through the design-parameter analysis.

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Experimental Studies on Aerodynamic Characteristics of Pantograph system for HEMU-400X (차세대 고속열차(HEMU-400X)의 팬터그래프 시스템에 대한 공력특성 연구)

  • Lee, Yeong-Bin;Rho, Joo-Hyun;Kwak, Min-Ho;Lee, Jae-Ho;Kim, Kyu-Hong;Lee, Dong-Ho
    • Proceedings of the KSR Conference
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    • pp.133-138
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    • 2010
  • This paper describes on aerodynamic characteristics of pantograph system for Next generation high speed train(HEMU-400). The pantograph which supports electric power is located on the roof. Because of this, it generate high drag, severe acoustic noise and vibration which induced unstable flow due to complex configuration. Therefore, the design of high efficient pantograph needs to increase operational speed. In this research, wind tunnel tests were performed to design a high efficient pantograph system using 1/4 scaled model which were KTX-II pantograph, single arm pantograph and periscope type pantograph with square cylinder shape panhead and optimized shape panhead. For real operational condition, flow directions were adapted by rotation of pantograph. From this results of wind tunnel, it is checked that the pantograph with optimized panhead and single arm type or periscope type has better aerodynamic performance. In addition, lift control device and spoiler in pantograph were tested to investigate the validity of application.

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Pantograph Detachment Detector and Control Scheme for a PWM rectifier Considering Pantograph Detachement Condition (전동차용 PWM 정류기를 위한 집전기(pantograph) 접점상태 검출방법 및 비접촉상태를 고려한 PWM 정류기 제어기법)

  • Song Hong-Seok;Nam Kwanghee
    • Proceedings of the KIPE Conference
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    • pp.275-278
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    • 2003
  • The pantograph contact can be disrupted due to irregularities in the motion. The pantograph detachment prohibits the current flow and makes the system uncontrollable. During the pantograph detachment period, the control error are accumulated by the integral property of the controller. The output of the controller, therefore, can be induced to be an extremely large value. When the pantograph is reattached, the extremely large output of the controllers causes a very high overshoot (or under-shoot) of the line current and the DC-link voltage. This work proposes a new method for detecting the pantograph bouncing conditions and designs a controller considering such conditions based on the pantograph bouncing detector.

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Aerodynamic Analysis of a Pantograph of a High Speed Train With a Pantograph Cover (커버 형상에 따른 고속전철 판토그래프의 공력특성 해석)

  • Kang, Hyung-Min;Kim, Cheol-Wan;Cho, Tae-Hwan;Kim, Dong-Ha;Yun, Su-Hwan;Kwon, Hyeok-Bin
    • Proceedings of the KSR Conference
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    • pp.81-87
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    • 2011
  • The aerodynamic features of a pantograph of a high speed train are analyzed according to shapes of pantograph covers. For this purpose, two types of pantograph covers were selected: a wedge type cover and a cone type cover. Then, the change of the aerodynamic forces of the pantograph affected by each type of the pantograph cover was computed. These results were compared with the original lift force of the pantograph. From the results, the cone type cover changes the flow direction from side to side compared with the wedge type cover. Consequently, it is confirmed that the effect of the wedge type cover on the lift force of pantograph is smaller than that of the cone type cover.

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Improving the Dynamic Characteristics of the Pantograph Using the Sensitivity Analysis (동적 민감도 해석을 이용한 판토그래프의 동특성 개선)

  • Kim, Jin-Woo;Park, Tong-Jin;Wang, Young-Yong;Han, Chang-Soo
    • Proceedings of the KSME Conference
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    • pp.679-685
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    • 2001
  • In this paper, the dynamic response of the pantograph system that supplies electrical power to a high-speed rail vehicle were investigated. The analysis of the catenary based on the Finite Element Method (FEM) is executed to develop a pantograph fits well in high-speed focused on the dynamic characteristic analysis of the pantograph system. By simulation of the pantograph-catenary system, the static deflection of the catenary, the stiffness variation in contact lines, the dynamic response of the catenary undergoing constant moving load and the contact force analysis were executed. In order to consider the design variables that effects on the dynamic characteristic of the pantograph system performed the dynamic sensitivity analysis. From the pantograph-catenary analysis, the design parameters of a pantograph could be improved. From the results of the sensitivity analysis, a pantograph with improved parameters is suitable for a high-speed rail vehicle from the design-parameter analysis.

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Prediction of the Aerodynamic Noise Generated by Pantograph on High Speed Trains (고속철도 판토그래프의 공력소음 기여도 연구)

  • Han, Jae Hyun;Kim, Tae Min;Kim, Jeung Tae
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.425-431
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    • 2013
  • Nowadays, high speed train has settled down as a fast and convenient environment-friendly transportation and it's need is gradually increasing. However increased train speed leads to increased aerodynamic noise, which causes critically affects comfortability of passengers. Especially, the pantograph of high speed train is protruded out of train body, which is the main factor for increased aerodynamic noise. Since aerodynamic noise caused pantograph should be measured in high speed, it is difficult to measure it and to analysis aerodynamic noise characteristics due to the various types of pantograph. In this research, aerodynamic noise of pantograph is predicted by CFD (Computational Fluid Dynamic) and FW-H (Ffowcs Williams-Hawkings) equation. Also, Wind tunnel test results and numerical simulation results were compared. As a result, Simulation results predicting sound pressure level is very similar with wind tunnel test result. To analyze contribution of the pantograph to the noise of high-speed train, simulation results compared with measurement results of exterior noise. The simulation reuslts found that pantograph is a dominant noise source of high-speed trains's exterior noise in low frequency section. This dominant noise was come out from vortex shedding of the panhead in the pantograph. This research will be utilized for reduce sound pressure level of pantograph.

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RESEARCH OF HIGH-SPEED TRAIN PANTOGRAPH SHAPE DESIGN FOR NOISE AND DRAG REDUCTION THROUGH COMPUTATIONAL ANALYSIS (전산해석을 통한 고속철도용 저소음 저저항 팬터그래프 형상설계 연구)

  • Jeong, S.M.;Lee, S.A.;Rho, J.H.;Kim, K.H.
    • Journal of computational fluids engineering
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    • v.20 no.2
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    • pp.67-72
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    • 2015
  • In this paper, study of high speed train pantograph arm shape and panhead cross-section for aerodynamic drag and noise reduction is performed. In previous research, it is known that knee of pantograph arm and panhead of pantogpraph are main sources of noise from high speed train pantograph. By numerical simulation using full scale pantograph model, pantograph arm and panhead optimization are performed. As a result, drag and noise are reduced at both studies about high speed pantograph.

Study of aerodynamic characteristic for a pantograph for Tilting train eXpress (TTX) (고속 틸팅열차의 틸팅 판토그라프 공력 특성 연구)

  • Ko T. H.;Kim G. N.;Goo D. H.
    • 한국전산유체공학회:학술대회논문집
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    • pp.177-180
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    • 2004
  • The development of a tilting train with construction of electric line on the conventional railway is required for speed-up on the conventional railway with many curving sections. For development of tilting train, the study and development of the tilting system and tilting bogie having the different mechanism with a general high speed train will play a main role for improving the technology in the field of Korean railway The study and development of the pantograph tilting mechanism in order to keep a good contact behavior between a pantograph and a contact wire by tilting a pantograph on the opposite direction of the vehicle tilting direction. In this study, we analyzed the aerodynamic characteristic of a developing pantograph on the tilting train and obtained the contact force with catenary by aerodynamic lift force by the aerodynamic analysis. We also performed the numerical analysis for design the device controlling lift force on a pantograph. From the aerodynamic simulation and parameter study for a device to control the lift force, we will suggest the various shape and the optimal shape of it corresponding to a developing tilting pantograph. The Fluent software is used for the calculation of flow profile in this study.

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A Study on the Wearing Phenomenon of Pantograph Slider for the SEOUL METRO Line 4 Rail Vehicles (4호선 전동차 판토그라프 주습판 마모현상에 관한 연구)

  • Kim, Young-Gyu;Yang, Yong-Joon
    • Proceedings of the KSR Conference
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    • pp.51-56
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    • 2007
  • Pantograph of the electric train is the important part receiving current by adhereing contact wire. Wearing rate of pantograph or contact wire is changed by the type of pantograph and material of adhering part. In special, the weather influences the relative wearing rate and wearing type of pantograph Slider and Contact wire with steep wearing in arc and life cycle of pantograph slider. Presently, the weather causes side-wearing and over-wearing of pantograph slide installed in electric train. So it is difficult to manage and operate the electric train. Although the quality of slide using in line4 vehicle was finished the test in line 2 vehicle experimentally, it has to apply after pantograph is installed in some electric trains and check the influence in it and contact wire. It is because line4 section is very different from line2 section. Experimental application is the sequence to certify the safety and abrasion resistance importantly by enlarging experimental application with increase of the experimental electric train. The lenth of line4 in Seoul Metro is 71.5[km]. It is long section. The line is mixed DC 1,500[V] section and AC 25,000[V] section. It has underground section of 41.5[km] and ground section of 30[km]. Ground section is about 42% and receives much influence in the rain during the rainy season. After experimental application we found that this pantograph slide has twice as much abrasion resistance despite a little deviation and found the occurrence probability of arc and side-wearing is decreased considerably.

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